Nut.



H. G. OARLSON.

NUT.

APPLICATION FILED JULY 11, 1912.

Patented Nov. 3, 1914.

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s ArnsEig OFFI ER HJALMAR G. cAnLsoN, orwoitons'rnn, MASSACHUSETTS, nssienon T0 nooxron o SPRINKLER COMPANY or MAssAon snrrs, onwoncnsrnn, ivmssncnusn'r'rs, A

CORPORATION or MASSACHUSETTS.

Specification of LettersPatent. Application filed. July 11, 1912.. Serial No. 703,902...

To all whomit may concern: a a a Be it known that I, HJALMAR CAnLsoN, a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Nuts, of which the following is a specification, accompanied by drawings forming a part of the same.

My present invention relates to an improved nut capable of being constructed of sheet metal, and it relates particularly to that class of nuts which are used to form a cap or finish for the ends of metallic pipes employed as conduits.

My invention is carried into effect as hereinafter described, the novel features being pointed out in the annexed claims.

Referring to the accompanying drawings, Figure 1 represents in central sectional view one end of a metal pipe having one of my improved nuts applied to its end. Fig. 2 is a side view of the nut detached from the pipe. Fig. 3 is an end view of the same. Fig. 1 represents the blank from whicha nut embodying my invention is made. Fig. 5 represents the blank in edge view. Fig. 6 is a central sectional view of a cup shaped blank from which the nut is made, said cup shaped blank being formed from the sheet metal blank shown in Figs. 4 and 5. Fig. 7 is a central sectional view of the cup shaped blank from which my improved nut is made and having at one end a right angled internal flange. Fig. 8 represents the same view as shown in Fig. 7 but with an internal screw thread. Fig. 9 is a central sectional view of the completed nut.

Similar reference characters refer to similar parts in the different figures.

Referring to the drawings, 1 denotes one end of apiece of pipe such, for example, as is employed as a conduit for electrical wires. One end of the pipe 1 is provided with an external screw thread 2 to receive a nut 3 embodying my present invention, said pipe and nut being shown in central sectional view. 7

In the construction of my improved nut I take a circular disk of sheet metal 1, shown in plan View in Fig. 4 and in edge view in Fig. 5. By means of appropriate punches and dies, I shape the blank 4 into a cup shaped blank 5 having a cylindrical side 5, with one end open at 6 and having its opposite end provided with a central hole 7 and having its corners 8, 8 slightly rounded.

Patented Nov. 3, 1914.-

In forming the cup shaped blank 5 I em-- ploypunches and dies of suitable shape to draw the sheet metal disk 4: into a cup shape with a series of external ribs 9, in the present instance eight in number, preferably arranged with equidistant spaces. The ribs 9 enable the periphery of the. nut to be seized by a wrench.

The interior of the cup shaped blank is provided with a series of recesses 10, 10 formed on the inside of the cup and exactly opposite the external ribs 9. The outer ribs 9 extend substantially the entire length of the nut, while the inner recesses 10, 10 extend from the open end 6 through that portion of the nut which is cylindrical, or

and upwardly forming a U-shapcd bend 13 and bringing the edge 14 of the flange 11 into a horizontal plane at right angles with the axis of the nut, as shown in Fig. 9. In turning the flange 11 inwardly, its edge 14 is brought slightly beyond the first screw thread 16, or far enough to cover the blank space 17, Fig. 8, in the interior of the nut.

When the nut is applied to the end of a pipe, as shown in Fig. 1, the side 5 of the nut is screwed on the outside of the pipe, with theinterior screw threads 12 engaging the exterior screw threads 2 on the pipe. The edge 14 of the flange 11 is parallel with the squared end 18 of the pipe 1 and, inasmuch as the interior screw threads 12 extend into the nut beneath the flange 11, the end 18 of the pipe may be screwed firmly against the edge 14: of the flange on the nut.

The recesses 10, 10 are substantially semicircular in cross section and they serve to gather in any dirt or iron chips that may rest upon the external screw thread 2 while the nut is being screwed upon the pipe.

I claim,

1. As an article of manufacture, a nut having an internal screw thread, the nut .be-

ing formed With a series of external longitudinal ribs and a series of internal longitudinal recesses opposite the ribs.

2. As an article of manufacture, a nut having an inturned flange at one end and an internal screw thread extending in Wardly from the opposite end, the nut being formed with a series of external longitudi nal ribs and a corresponding series of 1n ternal longitudinal recesses located opposite the ribs. I

3. As an article of manufacture, a nut having an inturned flange at one end and an internal screw thread extending inwardly from the opposite end, the screw thread extending beyond the inner end of the inturned flange, the nut being formed with a series of external longitudinal ribs and a corresponding series of internal longitudinal recesses located opposite the ribs.

Dated this fifth day of July 1912.

HJALMAR Gr. OARLSON.

Witnesses PENELOPE COMBERBACH, NELLIE WVHALEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, .D. G.

Correction in Letters Patent No. 1,116,241.

l l i It is hereby certified that the assignee in Letters Patent No. 1,116,2ei1, granted November 3, 19%, upon the application of Hjalnmr (i. Carlson, of Worcester,

Massachusetts, for an improvement in Nuts, was erroneously described and specified as Rockford Sprinkler Company of Massachusetts, whereas said assignee should have been described and specified as Rockwuod Sprinkler Owl/puny 0f llfassachu setts, as shown by the records of assignments in this oflice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent ()fiice.

Signed and sealed this :Hth day of November, A. D., 1914.

[SEAL] R. F. WHITEHEAD,

Acting Cbnmm'ssioner of Patents. 

